Hairy Manzanita

Arctostaphylos columbiana

Ericaceae · broadleaf evergreen shrub · native

Last updated

Hairy manzanita is a native evergreen shrub found on open, rocky coastal slopes from British Columbia to central California. Its distinctive hairy twigs and persistent foliage make it identifiable year-round. It dominates exposed ridgelines and coastal bluffs where few competitors thrive.

Grows 3 to 10 feet tall in full sun to part shade with low water needs and well-drained soil (Zones 7a to 8b). Slow growth and moderate lifespan suit it to rocky, infertile sites. Provide minimal supplemental water once established. Watch for black root rot, leaf gall, and Phytophthora dieback in wet settings; manzanita leafgall aphids may cause cosmetic galls.

Plant Profile

Size & Form

Height
3–10 ft
Growth Rate
Slow
Size at 20 yr
20 ft
Lifespan
Moderate

Site Requirements

Light
Sun to Part Shade
Soil Drainage
Adaptable
Soil pH
5.0-7.3
Water
Low
Drought Tolerance
Low
Hardiness
Zones 7a–8b

Ornamental Interest

Bloom Time
early spring
Origin
Pacific Northwest native
Watch for this season
RustHigh

Uredinial Stage (Summer)

AphidHigh

Peak Population & Dispersal

Root weevilModerate

Adult Emergence & Foliar Feeding

Diseases: Regionally Documented (5)

Pests: Regionally Documented (3)

Phenological Calendar

View full calendar (5 stages)
Stage Typical Window
New growth flush BBCH 11 Feb 15-Mar 15
Bloom start BBCH 61 Mar 1-Mar 31
Bloom end / petal fall BBCH 69 Apr 1-Apr 15
Fruit/seed development BBCH 71 Jun 1-Aug 31
Fruit/seed maturity BBCH 85 Sep 1-Nov 30
Data Maturity
Structured Multiple sources. Expert review underway.